List of highways numbered 518

Route 518, or Highway 518, may refer to:

Canada

 * Manitoba Provincial Road 518
 * Ontario Highway 518.svg Ontario Highway 518

United Kingdom

 * UK road A518.svg A518 road

United States

 * Florida 518.svg Florida State Road 518
 * Pasco County Road 518 FL.svg County Road 518 (Pasco County, Florida)
 * Louisiana 518.svg Louisiana Highway 518
 * MD_Route_518.svg Maryland Route 518
 * MT-sec-518.svg Montana Secondary Highway 518
 * Nevada 518.svg Nevada State Route 518
 * County_518.svg County Route 518 (New Jersey)
 * New Mexico 518.svg New Mexico State Road 518
 * OH-518.svg Ohio State Route 518
 * PA-518.svg Pennsylvania Route 518
 * South Carolina 518.svg South Carolina Highway 518 (former)
 * Texas FM 518.svg Farm to Market Road 518, Texas
 * Texas Loop 518.svg Texas State Highway Loop 518
 * Circle sign 518.svg Virginia State Route 518 (1928)
 * WA-518.svg Washington State Route 518
 * Territories:
 * Ellipse sign 518.svg Puerto Rico Highway 518